function RowsColor(even,towns){
	this.even=even;
	this.towns=towns;
}
RowsColor.prototype.setColor=function(tds){
	for (var i=0;i<tds.length;i++) {
		tds[i].style.background=(i%2==0?this.even:this.towns);
	}
}
RowsColor.prototype.removeColor=function(tds){
	for (var i=0;i<tds.length;i++) {
		tds[i].style.background="";
	}
}
